Java Notes

If you own souce code, make all methods final - never accidentally overridden

Arrays and collections should never be null

avoid state - like http - parallelism/distributed


eventHandling:
https://www.youtube.com/watch?v=ZUe1Xz7DAcY#t=17.905495



Proxy Pattern:
pre/post processing
overriding functinality
caching mechanism
security
eg: Spring AOP

https://www.udemy.com/java-design-patterns-tutorial/


JMX
Java Management Extensions - is the standard for java applications to expose their status.

Nagios - tool to get qualitative data about cluster status, polls current metrics and compares against thresholds.